I just found a 2002 with 34,000 miles and they want $14,900 for it. I know many say you can't base prices by using Kelly Blue Book, but I still believe it's a valid tool and it's how I determined when I was doing my search for a low-mileage 3rd Gen whether the asking price was fair or not. Patience paid off and I did find a 2000 with 111,000 for $6300. It would be awesome to own this 2002 with 34,000 miles but for $6000 over KBB, I don't think it's a good deal.
I agree with some of the others commenting on this post that $20,000 is pretty ridiculous, but hey, there's probably some collector type out there with tons of disposal income who would love to have it.
Like somebody suggested, you'll probably have a better chance selling it on Ebay or Craigslist because of the larger audience you'll be advertising it to.